I don't think lemmy is still growing. I might be wrong but this graph https://fedidb.org/current-events/threadiverse
is trending down and i've seen a lot of smaller magazines/communities that haven't had any posts for 1-2weeks by now.
I try to help that problem at little but i doubt lemmy&kbin has >100k active users right now.

A one-day minor downtick isn’t a trend when it’s been up day-over-day for a while now. I’m sure the user counts will ebb and flow over time, but as long as the community stays healthy and the big social media companies keep being greedy, I think this platform has a good shot at long-term viability.